Customizing Device Application Designer Code

After you generate code from your BlackBerry development environment, choosing the Custom Class generation option, go to the folders that contain the custom classes, and modify the code as needed. For example, adding controls to screens, adding widget event code, and so on.

public class BOBScreenSales_order extends 
BaseBOBScreen implements IBOBScreen {

	protected void defineScreen() {
		createControls();
		createMenus();
	}

	protected void createControls() {
		createControlById(CONTROL1);
		configureControlById(CONTROL1);
	}

	protected void configureControlById(int ID) {
		switch (ID) {
		case LAYOUTMANAGER:
			configureObjectMetaDataById(ID, layoutManager);
			configureObjectHandlersById(ID, layoutManager);
			return;
		}
	}

	protected void createMenus() {
		menu1 = createMenuById(MENU1);
	}

	public Object getControlById(int ID);
}

• Manually Adding Controls to a Screen
  The createControls method allows you to manually add controls to a screen.
• Writing Widget Event Code
  To enable widget events, you must first specify events for a control from its coding properties tab.
• Adding Validators
  You can assign TextInput a vector of validators. Validator validates the text input’s value based on the validation types and patterns.
• Perform UI Binding to an MBO
  You can perform UI binding to an MBO through the configureObjectMetaDataById method.
• Access Pending Operations and Operation Logs
  MBOModel is an object for mobile business objects, and has a method called getPendingObjects to return pending operations. A pending object is the combined pending operations on that object instance.
• Connecting to Unwired Server
  CommonMBOModel defines loginToSync to log in to the Unwired Server.
• Adding or Modifying Navigation
  To add navigation to a screen, you can add ScreenAction to controls or menus that take actions.
• Adding or Modifying Actions
  You can add or modify actions for controls or menus through the configureObjectHandlersById method.
• Creating and Assigning Variables
  There are four types of variables: user, system, table and personalized.
• Using PIM Actions
  You can add a PIM action to a control to integrate the control with a BlackBerry PIM application. The PIM action constructor takes the following arguments.
• Using LayoutManager
  These examples illustrate how to customize margin and button layout.